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Preparation method of high-permeability and high-elastic polyurethane elastomer

A technology of polyurethane elastomer and polyurethane prepolymer, applied in the field of polyurethane application, can solve the problems of narrow hardness range, poor resilience, and reduced transparency of high-elastic elastomers, and achieves excellent processing performance, low equipment requirements, Energy saving effect

Active Publication Date: 2019-01-18
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN101134843A discloses a kind of preparation method of high elastic polyurethane elastomer, adopts PTMG2000 or PPG3000 and BDO, catalyst, antiaging agent to mix as polymer component, the isocyanate in the prepolymer component selects MDI, carbodiimide modification MDI and their mixtures, the high elastic elastomer produced has a narrow hardness range (Shao A80±2), and poor rebound performance
[0005] The isocyanates commonly used in the synthesis of polyurethane elastomers are mainly aromatic diisocyanates TDI and MDI. Due to the existence of benzene rings, the polyurethane elastomers synthesized with these two isocyanates contain aromatic urea bridges. Once irradiated by ultraviolet light, it is easy to form Chromogenic quinone structure, so that the product turns yellow and reduces transparency

Method used

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  • Preparation method of high-permeability and high-elastic polyurethane elastomer

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Experimental program
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Effect test

Embodiment 1

[0038] The components of the two-component high-permeability and high-elasticity polyurethane elastomer are as follows:

[0039] Component A: 93% and 7% of PTMG2000 and HDO with moisture content ≦0.03%, respectively, 0.4% of bismuth catalyst, 0.2% of antioxidant UV-1076 and 0.3% of UV-328, mix well to obtain component A.

[0040] Component B: PTMG2000 66.4% and MDI-100 33.6% with moisture content≦0.03% were reacted at 85°C for 2.5 hours, and vacuum (-0.095MPa) was used to remove air bubbles to obtain a prepolymer with an isocyanate content of 8.5%.

[0041] The mixing temperature of A and B two-components is controlled at 65°C. After mixing evenly according to the mass ratio of A:B=100:100, pour it into a mold at 75°C, and open the mold for 40 minutes. The hardness can be obtained as Shore 65A. Rebound is 85% high-permeability and high-elasticity polyurethane elastomer.

Embodiment 2

[0043] The components of the two-component high-permeability and high-elasticity polyurethane elastomer are as follows:

[0044] Component A: PTMG1000 with moisture content ≦0.03%, PTMG2000 and HDO 25%, 65% and 10%, bismuth catalyst 0.5%, antioxidant UV-1076 0.2% and UV-328 0.3%, mix well to get A components.

[0045]Component B: PTMG2000 63% and MDI-100 37% with moisture content≦0.03% were reacted at 85°C for 2.5 hours, and vacuum (-0.095MPa) was used to remove air bubbles to obtain a prepolymer with an isocyanate content of 9.8%.

[0046] The mixing temperature of A and B two-components is controlled at 65°C. After mixing evenly according to the mass ratio of A:B=80:100, pour it into a mold at 75°C, and open the mold for 40 minutes. The hardness can be obtained as Shore 75A. Rebound is 82% high-permeability and high-elasticity polyurethane elastomer.

Embodiment 3

[0048] The components of the two-component high-permeability and high-elasticity polyurethane elastomer are as follows:

[0049] Component A: PTMG1000 with moisture content ≦0.03%, PTMG2000 and HDO 41.7%, 38.3% and 20% respectively, bismuth catalyst 0.6%, antioxidant UV-1076 0.2% and UV-328 0.3%, mix well to get A components.

[0050] B component: PTMG2000 57% and MDI-100 38.7% with moisture content≦0.03%, H 12 MDI 4.3% was reacted at 85° C. for 2 hours, and vacuum (-0.095 MPa) was used to remove air bubbles to obtain a prepolymer with an isocyanate content of 12%.

[0051] The mixing temperature of A and B two-components is controlled at 65°C. After mixing evenly according to the mass ratio of A:B=60:100, pour it into a mold at 75°C, and open the mold for 40 minutes. The hardness can be obtained as Shore 85A. Rebound is 79% high-permeability and high-elasticity polyurethane elastomer.

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Abstract

The invention relates to a preparation method of a high-permeability and high-elastic polyurethane elastomer and belongs to the technical field of polyurethane application. The preparation method of the high-permeability and high-elastic polyurethane elastomer comprises the steps of preserving PTMG, HDO, a catalyst and an antioxidant in a sealed manner after uniformly mixing the PTMG, the HDO, thecatalyst and the antioxidant under a room temperature condition according to a certain mass ratio; enabling the PTMG to react with isocyanate for 2-3 hours at 80-85 degrees centigrade, wherein the vacuum degree is larger than or equal to -0.095 MPa; obtaining a polyurethane prepolymer component with isocyanate content of 8.5-13.2%; controlling a polymer component and the polyurethane prepolymer component at a temperature of 60-80 degrees centigrade to be mixed; after uniformly mixing the polymer component and the polyurethane prepolymer component according to a ratio of (40-100):100, pouringan obtained mixture into a mold at the temperature of 70-90 degrees centigrade; and opening the mold after 30-45 minutes to obtain the high-permeability and high-elastic polyurethane elastomer. The high-permeability and high-elastic polyurethane elastomer prepared with the preparation method of the high-permeability and high-elastic polyurethane elastomer, provided by the invention, has the advantages that the transparency is relatively high, the rebound resilience is relatively high, the yellowing resistance is relatively high, and demands of the market on the high-permeability and high-elastic polyurethane elastomer are met.

Description

technical field [0001] The invention relates to a preparation method of a high-permeability and high-elasticity polyurethane elastomer, which belongs to the technical field of polyurethane application. Background technique [0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of hardness adjustment. It has both the elasticity of rubber and the hardness of plastic, and has good mechanical properties, wear resistance and resilience. , has become the fastest-growing polymer material after PE, PP, PVC, PS, and phenolic resin. The transparent polyurethane elastomer not only has excellent optical properties, but also has a wide hardness range and high mechanical strength of polyurethane elasticity. It is suitable for optics, ballistic launch and handicraft production, etc. It can be used to make spectacle lenses, bulletproof glass, and trademark nameplates. Wait. The type of isocyanate, the type of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32
CPCC08G18/3206C08G18/4808C08G18/4854C08G18/724C08G18/755C08G18/758C08G18/7671
Inventor 刘兆阳宿金明房玉俊李涛
Owner SHANDONG INOV POLYURETHANE
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